A test device that can simulate the effects of day and night ultraviolet light on asphalt

Abstract

The present invention discloses a test device capable of simulating the effects of daytime and nighttime ultraviolet light on asphalt. The device comprises a housing, an operation display panel, and an ultraviolet aging simulation mechanism. The operation display panel comprises operation buttons and a display panel. The operation buttons comprise a power switch, a start button, a lift cycle operation button, a lift rotation button, an ultraviolet light source switch, a lift cycle selector, and a timer. The display panel comprises a first liquid crystal display screen and a second liquid crystal display screen. The ultraviolet aging simulation mechanism comprises an ultraviolet light source, a holding tray disposed under the ultraviolet light source for holding an asphalt sample, a shading mechanism, and a lifting component. The holding tray is provided with an ultraviolet irradiance detector. The present invention uses the lifting component to adjust the distance between the asphalt sample and the ultraviolet light source, and provides a shading mechanism to shield the asphalt sample. This facilitates simulation of actual changes in ultraviolet radiation intensity throughout the day and accurately obtains the ultraviolet radiation intensity experienced by the asphalt sample surface during the test.

Description

Technical Field

[0001] The invention belongs to the technical field of testing road engineering materials, and in particular relates to a testing device capable of simulating the influence of ultraviolet light on asphalt during the day and night. Background Art

[0002] Asphalt is a temperature-dependent viscoelastic material. It is a black, quasi-solid material at room temperature but behaves as a fluid at elevated temperatures. As a binder for asphalt pavements, its aging resistance directly impacts pavement performance. Asphalt aging is affected by a variety of factors, including heating during mixing and paving, oxidation during use, and the effects of sunlight.

[0003] In recent years, researchers have discovered that in some high-altitude areas where oxygen concentrations and average annual temperatures are low, and where traffic volume (vehicle load) is low, asphalt pavement surfaces can experience carbonization. This rapidly degrades the adhesion between the surface asphalt and the aggregate, leading to cracking, loosening, and other defects in the pavement within a short period of service. Preliminary research, both domestically and internationally, suggests that the aging of asphalt pavements in these areas is not driven by traditional thermal and oxygen factors, as is commonly understood, but rather by ultraviolet light.

[0004] Current indoor simulations of asphalt UV aging primarily use UV light sources in UV aging chambers to accelerate the aging of asphalt specimens. However, these tests fail to account for regional climates and daily variations in UV radiation intensity. Conventional UV aging chambers have high UV light intensity, which cannot realistically simulate the variations in UV intensity throughout the day. Furthermore, during asphalt UV aging tests, the UV radiation intensity to which the asphalt surface is exposed cannot be accurately measured, resulting in inaccurate simulation results. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the deficiencies in the above-mentioned prior art and provide a test device that can simulate the effects of ultraviolet light on asphalt during the day and night. The device has a simple structure and a reasonable design. The distance between the asphalt sample and the ultraviolet light source is adjusted by a lifting component, and a shading mechanism is provided to shield the asphalt sample, thereby simulating the actual changes in ultraviolet radiation intensity during a day. The ultraviolet radiation intensity received by the surface of the asphalt sample during the test is accurately obtained by an ultraviolet irradiance detector.

[0006] To solve the above technical problems, the present invention adopts a technical solution: a test device capable of simulating the effects of ultraviolet light on asphalt during the day and night, characterized by comprising a box, an operation display panel provided on the opening and closing door of the box, and an ultraviolet aging simulation mechanism provided in the box;

[0007] The operation display panel includes operation buttons and a display panel, wherein the operation buttons include a power switch, a start button, a lifting cycle operation button, a lifting rotation button, an ultraviolet light source switch, a lifting cycle selector, and a timer, and the display panel includes a first liquid crystal display screen and a second liquid crystal display screen;

[0008] The ultraviolet aging simulation mechanism includes an ultraviolet light source arranged in the top of the box, a holding tray arranged under the ultraviolet light source and for holding asphalt samples, a shading mechanism arranged on the holding tray, and a lifting component arranged in the bottom of the box and for installing the holding tray, and an ultraviolet irradiance detector is provided on the holding tray.

[0009] The above-mentioned test device capable of simulating the effects of ultraviolet light on asphalt during the day and at night is characterized in that: a partition is provided in the box, the lifting component is mounted on the partition, a control module is provided in the bottom of the box and below the partition, the control module includes a controller, and the first and second liquid crystal displays are both controlled by the controller;

[0010] The power switch, the start key, the lifting cycle operation key, the lifting rotation button, the ultraviolet light source switch, the lifting cycle selector and the timer are all connected to the input end of the controller.

[0011] The above-mentioned test device that can simulate the impact of ultraviolet light on asphalt during the day and night is characterized in that the lifting component includes a base, an electric push rod arranged on the base and a disc arranged on the telescopic end of the electric push rod, and the shading mechanism is arranged on the disc.

[0012] The above-mentioned test device that can simulate the impact of ultraviolet light on asphalt during the day and night is characterized in that: the containing plate includes a bottom disc and a ring arranged on the bottom disc, the shading mechanism includes four baffle components evenly distributed on the ring and capable of opening and closing, and a cross-shaped partition is provided on the bottom disc, which divides the ring into four arc segments that cooperate with the four baffle components; the cross-shaped partition divides the bottom disc into four test placement areas that cooperate with the four baffle components.

[0013] The above-mentioned test device that can simulate the impact of ultraviolet light on asphalt during the day and night is characterized in that: the four baffle components each include a slide plate, a baffle plate arranged on the slide plate and a linear stepper motor that drives the slide plate to slide radially along the ring. The baffle plate is a right-angle fan-shaped baffle plate, and the bottom surface of the baffle plate is flush with the top surface of the ring.

[0014] The above-mentioned test device capable of simulating the influence of ultraviolet light on asphalt during the day and night is characterized in that each of the placement areas is provided with an ultraviolet irradiance detector.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The test device of the present invention is easy to operate, greatly improves the test efficiency, and solves the health problem of operators being sunburned by ultraviolet rays.

[0017] 2. The test device of the present invention can reduce the number of times the UV aging box is turned on and off, extend the service life of the UV light source, and can accurately measure the intensity of ultraviolet radiation received by the surface of asphalt samples at different heights, facilitating subsequent data analysis.

[0018] 3. The present invention adjusts the distance between the asphalt sample and the ultraviolet light source through a lifting component and sets a shading mechanism to shield the asphalt sample, which is convenient for simulating the actual change in ultraviolet radiation intensity in a day, is more in line with reality, and improves the accuracy of the simulation test.

[0019] In summary, the present invention has a simple structure and a reasonable design. The distance between the asphalt sample and the ultraviolet light source is adjusted by a lifting component, and a shading mechanism is provided to shield the asphalt sample, which is convenient for simulating the actual changes in ultraviolet radiation intensity in a day and accurately obtaining the ultraviolet radiation intensity received by the surface of the asphalt sample during the test.

[0020] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention (opening and closing door closing).

[0022] Figure 2 It is a structural schematic diagram of the present invention (opening the opening and closing door).

[0023] Figure 3 Schematic diagram of the structure of the shading mechanism of the present invention.

[0024] Figure 4 It is a structural schematic diagram of the shading mechanism and lifting components of the present invention.

[0025] Description of the accompanying drawings:

[0026] 1—Power switch; 2—First LCD screen; 3—Start button;

[0027] 4—Lift cycle operation key; 5—Lift rotation button; 6—UV light source switch;

[0028] 7—Second LCD display; 8—Up / Down cycle selector; 9—Timer;

[0029] 10—UV light source; 11—light-shielding mechanism; 12—disc;

[0030] 14—shield; 15—slide board;

[0031] 16—chute; 17—ultraviolet irradiance detector; 18—electric push rod;

[0032] 19—base; 20—box; 21—opening and closing door;

[0033] 23—Ring; 24—Cross-shaped partition; 25—Bottom disc. DETAILED DESCRIPTION

[0034] like Figures 1 to 4 As shown, the present invention includes a box body 20, an operation display panel provided on an opening and closing door 21 of the box body 20, and an ultraviolet aging simulation mechanism provided in the box body 20;

[0035] The operation display panel includes operation buttons and a display panel. The operation buttons include a power switch 1, a start button 3, a lifting cycle operation button 4, a lifting rotation button 5, an ultraviolet light source switch 6, a lifting cycle selector 8, and a timer 9. The display panel includes a first liquid crystal display 2 and a second liquid crystal display 7.

[0036] The ultraviolet aging simulation mechanism includes an ultraviolet light source 10 arranged in the top of the box 20, a holding tray arranged under the ultraviolet light source 10 and for holding asphalt samples, a shading mechanism 11 arranged on the holding tray, and a lifting component arranged in the bottom of the box 20 and for installing the holding tray, and an ultraviolet irradiance detector 17 is provided on the holding tray.

[0037] In this embodiment, a partition is provided in the box 20, and the lifting component is installed on the partition. A control module is provided in the bottom of the box 20 and below the partition. The control module includes a controller. The first LCD screen 2 and the second LCD screen 7 are both controlled by the controller.

[0038] The power switch 1, the start key 3, the lifting cycle operation key 4, the lifting rotation button 5, the ultraviolet light source switch 6, the lifting cycle selector 8, and the timer 9 are all connected to the input end of the controller.

[0039] In this embodiment, the lifting component includes a base 19 , an electric push rod 18 provided on the base 19 , and a disc 12 provided on the telescopic end of the electric push rod 18 . The shading mechanism 11 is provided on the disc 12 .

[0040] In this embodiment, the containing plate includes a bottom disc 25 and a ring 23 arranged on the bottom disc 25, and the shading mechanism 11 includes four baffle components evenly distributed on the ring 23 and capable of opening and closing. A cross-shaped partition 24 is provided on the bottom disc 25, and the cross-shaped partition 24 divides the ring 23 into four arc segments that cooperate with the four baffle components; the cross-shaped partition 24 divides the bottom disc 25 into four test placement areas that cooperate with the four baffle components.

[0041] In this embodiment, the four baffle components all include a slide plate 15, a baffle plate 14 arranged on the slide plate 15, and a linear stepping motor that drives the slide plate 15 to slide radially along the ring 23. The baffle plate 14 is a right-angle fan-shaped baffle plate, and the bottom surface of the baffle plate 14 is flush with the top surface of the ring 23.

[0042] In this embodiment, each placement area is provided with an ultraviolet irradiance detector 17 .

[0043] In this embodiment, in actual use, the electric push rod 18 can refer to the KGG linear transmission device SL 42 micro electric push rod linear actuator.

[0044] In this embodiment, during actual use, the fixed end of the electric push rod 18 is mounted on the base 19 .

[0045] In this embodiment, in actual use, motor seats for mounting a linear stepping motor are provided on the side walls of the ring 23. The lead screw of the linear stepping motor is connected to the end of the slide 15 extending out of the ring 23. The linear stepping motor is not shown in the figure.

[0046] In this embodiment, during actual use, a sliding groove 16 for the sliding plate 15 to slide is provided on the arc segment of the circular ring 23 .

[0047] In this embodiment, in actual use, the four ultraviolet irradiance detectors 17 are connected to the input end of the controller.

[0048] In this embodiment, during actual use, the base 19 is fitted on the partition.

[0049] In this embodiment, further, the ultraviolet irradiance detector 17 can realize ultraviolet radiation intensity measurement according to test requirements, so as to provide guidance for simulation tests.

[0050] In this embodiment, further, the second liquid crystal display screen 7 can display the ultraviolet radiation intensity measured by the ultraviolet radiation detector 17, so as to facilitate understanding of the lifting and lowering status of the shielding plate 14 and the disk 12.

[0051] In this embodiment, the lifting cycle operation key 4 is used to adjust the lifting cycle movement of the disc 12;

[0052] The lifting and lowering rotary button 5 is provided to realize rotation in two directions, thereby controlling the lifting and lowering of the disc 12, so as to simulate the ultraviolet radiation intensity of the asphalt sample at different heights;

[0053] The lifting cycle selector 8 is provided to select the time required for the disc 12 to complete one lifting. At the same time, the extension cycle of the shading mechanism 11 is consistent with the lifting cycle of the disc 12, which can more realistically simulate the ultraviolet radiation to which the asphalt sample in the box 20 is exposed in one day.

[0054] In this embodiment, the timer 9 is provided to adjust the simulated aging time of the asphalt sample.

[0055] In this embodiment, a linear stepper motor is provided to drive the shielding plate 14 to slide radially along the ring 23 via the slide plate 15, thereby realizing the extension and retraction of the shielding plate 14, and facilitating the adjustment of the ultraviolet radiation received by the asphalt sample.

[0056] In this embodiment, before conducting the accelerated simulation of outdoor asphalt UV aging, the daily UV radiation intensity of the simulated area is tested to establish the parameters of the UV aging simulation test for the asphalt accelerated aging test:

[0057] The ultraviolet radiation intensity between sunrise and the strongest ultraviolet radiation intensity at noon is recorded as each rising ultraviolet radiation intensity;

[0058] The UV radiation intensity between the strongest UV radiation intensity at noon and sunset is recorded as each descending UV radiation intensity;

[0059] In this embodiment, during actual use, a temperature sensor is provided in the box 20. Before the accelerated simulation of outdoor asphalt ultraviolet aging is carried out, the daily ambient temperature of the simulation area is detected. This facilitates the adjustment of the environment of the asphalt sample to meet the actual daily ambient temperature of the simulation area during the asphalt accelerated aging test, thereby improving the accuracy of the test simulation.

[0060] The specific method of the present invention comprises the following steps:

[0061] Step 1: operate the power switch 1, and the controller, the first liquid crystal display 2, and the second liquid crystal display 7 work normally;

[0062] Step 2: Set the test required temperature through the first LCD screen 2;

[0063] Step 3: Operate the UV light source switch 6 to turn on the UV light source 10, and operate the lifting and rotating button 5;

[0064] Step 4: setting the lowest setting position and the highest setting position of the disk through the first liquid crystal display 2, and operating the ultraviolet light source switch 6 to turn off the ultraviolet light source 10;

[0065] Step 5: Select the disc lifting cycle through the lifting cycle selector 8; wherein the disc lifting cycle is the time it takes for the disc to rise from its lowest set position to its highest set position;

[0066] Step 6: Open the door 21, place the aging tray containing the asphalt sample in each test placement area, and close the door 21; the asphalt sample in the i-th test placement area is recorded as the i-th asphalt sample, where i is a positive integer of 1, 2, 3, or 4;

[0067] Step 7: Initially, the operating disc 12 is at the lowest setting position;

[0068] Step 8: Operate the UV light source switch 6 to turn on the UV light source 10, and operate the start key 3 and the lift cycle operation key 4. The test device enters the UV aging simulation test. During the UV aging simulation test:

[0069] The controller controls the electric push rod 18 to rise, and the electric push rod 18 rises and drives the i-th asphalt sample in the shading mechanism 11 to rise through the disc 12; at the same time, the controller controls the linear stepping motor to drive the shielding plate 14 to move away from the center of the bottom disc 25 through the slide plate 15, and during the rising process of the i-th asphalt sample, the ultraviolet radiation intensity tested by the ultraviolet irradiance detector 17 meets the various rising ultraviolet radiation intensities until the disc 12 rises to the highest set position of the disc, and the entire test placement area is completely exposed. At this time, the ultraviolet radiation intensity tested by the ultraviolet irradiance detector 17 meets the strongest ultraviolet radiation intensity at noon in the actual simulated area, thereby realizing a simulation test of the ultraviolet radiation conditions between sunrise and noon during the daytime.

[0070] Then the controller controls the electric push rod 18 to descend, and the electric push rod 18 descends to drive the i-th asphalt sample in the shading mechanism 11 to descend through the disc 12; at the same time, the controller controls the linear stepping motor to drive the shielding plate 14 to move away from the center of the bottom disc 25 through the slide 15, and during the descent of the i-th asphalt sample, the ultraviolet radiation intensity tested by the ultraviolet irradiance detector 17 meets each descending ultraviolet radiation intensity until the disc 12 descends to the lowest set position of the disc, and the shielding plate 14 covers and blocks the entire test placement area, thereby realizing a simulated test of the ultraviolet radiation conditions between noon and sunset;

[0071] Afterwards, the ultraviolet light source switch 6 is operated to turn off the ultraviolet light source 10 to implement a night simulation test, thereby simulating the actual ultraviolet radiation conditions of asphalt for a day and night.

[0072] In summary, the present invention has a simple structure and reasonable design, is easy to remove after the wire pipe is installed, does not cause damage to the test device that can simulate the impact of ultraviolet light on asphalt during the day and night, can be recycled, reduces construction costs, and is highly practical.

[0073] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A test device that can simulate the effects of ultraviolet light on asphalt during the day and night, characterized by: It comprises a box body (20), an operation display panel arranged on an opening and closing door (21) of the box body (20), and an ultraviolet aging simulation mechanism arranged in the box body (20); The operation display panel includes operation buttons and a display panel, wherein the operation buttons include a power switch (1), a start button (3), a lifting cycle operation button (4), a lifting rotation button (5), an ultraviolet light source switch (6), a lifting cycle selector (8) and a timer (9), and the display panel includes a first liquid crystal display screen (2) and a second liquid crystal display screen (7); The ultraviolet aging simulation mechanism includes an ultraviolet light source (10) arranged in the top of a box (20), a holding tray arranged under the ultraviolet light source (10) for holding an asphalt sample, a light shielding mechanism (11) arranged on the holding tray, and a lifting component arranged in the bottom of the box (20) for mounting the holding tray, wherein an ultraviolet irradiance detector (17) is arranged on the holding tray; The lifting component comprises a base (19), an electric push rod (18) arranged on the base (19), and a disc (12) arranged on the telescopic end of the electric push rod (18), and the shading mechanism (11) is arranged on the disc (12); The containing tray comprises a bottom disc (25) and a circular ring (23) arranged on the bottom disc (25); the shading mechanism (11) comprises four shielding plate components evenly distributed on the circular ring (23) and capable of opening and closing; a cross-shaped partition (24) is arranged on the bottom disc (25); the cross-shaped partition (24) divides the circular ring (23) into four arc segments that cooperate with the four shielding plate components; and the cross-shaped partition (24) divides the bottom disc (25) into four test placement areas that cooperate with the four shielding plate components.

2. A test device capable of simulating the effects of day and night ultraviolet light on asphalt according to claim 1, characterized in that: A partition is provided in the box (20), the lifting component is mounted on the partition, a control module is provided in the bottom of the box (20) and below the partition, the control module includes a controller, and the first liquid crystal display (2) and the second liquid crystal display (7) are both controlled by the controller; The power switch (1), the start key (3), the lifting cycle operation key (4), the lifting rotation button (5), the ultraviolet light source switch (6), the lifting cycle selector (8), and the timer (9) are all connected to the input end of the controller.

3. A test device capable of simulating the effects of day and night ultraviolet light on asphalt according to claim 1, characterized in that: The four shielding plate components each include a slide plate (15), a shielding plate (14) arranged on the slide plate (15), and a linear stepping motor that drives the slide plate (15) to slide radially along the ring (23); the shielding plate (14) is a right-angled fan-shaped shielding plate, and the bottom surface of the shielding plate (14) is flush with the top surface of the ring (23).

4. A test device capable of simulating the effects of day and night ultraviolet light on asphalt according to claim 1, characterized in that: Each placement area is provided with an ultraviolet irradiance detector (17).

Images